2(a) Explain the following addressing modes (i) Immediate Addressing ii Direct Addressing (iii Indirect Addressing (iv) External Direct ( Code Indirect (b) Write a program in 8051 assembly language to count between 0 and 9 for a seven segment display, support explanation with diagram 3. a(i) Define the term ADC and DAC (ii) Design an intelligent temperature controller capable system capable of maintaining temperature range between 300 c and 400 c and write an equivalent program in 8051 assembly language